Ventilating mechanism



May 19, 192.5.

G T MARKE-:Y

VENTILATING MECHANISM Filed March 1, 1923 F 1g l rf/T ATTORNEYS.

Patented May u 19, 1925.

UNITED STATES PATENT oFFls/CE;

' GEORGE THOMAS MARKEY, or Eon-T ATKiNsoN, wisooNsN, AssIeNoE 'ro JAMES MANUFACTURING COMPANY, ,or roar ATKTNsoN, WISCONSIN. 1

y vENTILArINe MEcHANTsi/r. y

Application led March l, `1,5123. ySerial No. 621,990. l

To all whom it may concern/.f

Be it known that I, GEORGEl THOMAS MARKEY, a citizen of theUnited States, re-

siding at Fort Atkinson, county of Jeffery son, and State of Wisconsin, haveinvented new and useful Improvements in Ventilating Mechanism, of which the following is a spec-y ification.` i A This inventionvrelates to improvements in Ventilating mechanism. c

More `particularly this invention relates to Ventilating systems which operate upon the principle of air displacement induced byA gravity and inl which the inlet device is lo- `cated in the outer wall near the ceiling of a room to be ventilated and the outlet device is located near the iioor and communicates with a Ventilating stack, or chimney. In such systems .the incoming air is directed upwardly against the ceiling to disseminate it about the room so that, occupants thereof will not have a current of cool air blowing upon them.

Atmospheric conditions are frequently such that a reversal of the' air currents take place causing the airto iow down the chino-1 ney and out through the inlet of theventilati ingl device unless meansare provided for checking ,the reversed current.,

lt is, therefore, the primary obJect of this invention to provide a checlrvalve of small inertia and of lan extremely sensitive and well balanced construction which `will be automatically closed or opened by a very light pressure thereon induced by reversals of air currents flowing through a ventilator opening.

vide a stop for the valve which may be man-L ually adjusted to a plurality of positions,

inlet Ventilating device, showing the valve,`

and the manually operable stop therefor. a Fig. 2 is a perspective view of a modified form of the device with a portion of the wall 'broken away to show the valve in closed u position.

inother object of this inventionis to prof Fig. 3 is a fragmentary `end view of the device in section with thevalve removed.

vFig. 4 is a view of thefvalve removed from the-ventilator. y

'Like parts areidentied'by the same ref-- erence characters throughout the several terial 6 about the interior of its ,walls 7, top

8, and bottom ,9. The box has, an opening l l() communicating with opening 2 in the wall and an opening 11 communicating with the room and adapted `to direct the inc'om`- ing air upwardly against the ceiling 3.

f The boa r is provided with a framework of sheet metal adjacent" the opening 10, said `frame comprising side plates 11iconnected together bytransverse plate 12 which at one end extends along a portion of the bottom Aof the box and at thel other end rises at an inclination adapted to` direct incoming ai] upwardly. Above platesll are disposed triaiigularshaped plates 13 having inclined `sides 14 upon which the valve 15 is `adapted to rest in one position to close the openingV 10.

Spaced fromplate 12 and extending transy `versely between plates 11', is `,the margin of a valve'support 16. .The support 16 is formed to provide a flange 17 gaportion 17 `of which is bent to receiveand retain a pintle 19 upon which the valve stop V18 `is pivotally mounted.` `v

kA bracket 2() is secured to the upper face of support 16 and provides arecess transversely of which extends a pin upon which the post 21 is pivotally mounted.` Extend- 22 secured thereto and Vprovided with spaced arms 22 adapted to receive post 21'in frictional engagement. Extending transversely r,between the arms 22 of the lever 22 are pins 23 spaced apart and positioned upon either side of the post to retain the latter `properly Apositioned within the lever. IA chain 211' is provided for manually operating the' stop about its pivot and passes over a pulley 25 carried by theboX. An intermediate por- 4tionofthe chain is secured to the lever at "26, both, ends extending through holes 27 "ing at right angles from'stop 18"`is a lever? i in the bottom 9 to a convenient height above the Hoor of the room, to be reached and utilized toactu-a'te the stop.` i

Secured 'to and extending between the plates 12 and 16, are pins 28 and 29 spaced transversely from'eacli `other and adapted The valve is pro-- vided with holes adapted to receive pins to support Athe valve 15.

28 and 29 and has a counter balance 31. The valve extends into the cavity formed by the inclined plates 12 and y16 and is of sufficient Width to extend across the box and to rest upon the plates 13 in 'its closed posi tion. Theangle of plates 12 and l16 is such as to permit the valve to move freely between its extremeopenL and closed positions.

i l In the modiiieldfform of theventilator box shown in Fig. 2, the air is directed downy yvardly insteadV of upwardly as in the box shown in Fig.1,.and is disseminated `about 432 which is'sethe room `by the platform Vhenthe Ventilating levice is delivering air to thevroo'i'n, ,the airentersopenings 2 and 10, holding the lvalvein yopengposition against the stop'18 .and passing over the top ofthe valve and outthrough the opening Icofiifimunicating with theroom. If a reversal of the air current takes 4place,s0

that-the air tends to flow from the room into again when the air tends ,again to take its `noflmal course intothe room.

The stop '18 and its associated mechanism ,has been provided for the purpose of limiting the extent to which the valve may open,

vbeen designed in Whichf an automatically e vthereby regulating ythe-aniountof air that may enter a room. lIf it is desired to decrease the supply of air, the lend 34 ofthe chain Willbe,pulled .downwardly to raise thejlever 2 2 ywhich `Will rotate the stop 18 about its. pivot in a counteicloclrwise direction to auy-v desired position. rlhe stop will be retained in any one of a plurality of posi# l i y v lberfpivoted substantially colaxially With tions `by the post 21 with which the'lever is fric'tiyonally engaged, Vhenl a greater lsup- .ply of air is desiredl the Stop VWill be rotated about itspivotin -a clockwise direction to any desired position by pulling the "end-:

of the chain downwardly. The stop is movableto a position such that the valve may be maintained in a Wholly vclosed position if desired.

, A ventilator mechanism has therefore operated valve made of a thin sheet of-metal, is so balancedtha-t very slight pressure upon either side ivill move the valve to closed or open `position accordingly. The valve is fulcruined upon horizontalpins and is yfor lthat reason substantially free of e. all friction that might tend to Aretard'its movesaid arm and member in 'a vselected y of oscillation 'about {sa'idaxis ments. The fulcrumed mounting of the valve rovides a rolling bearing, Whereas if -a pint e mounting Were provided, fthe valve 'would have a slidingbearing and Would the controlling means are'secured toa meinber vwhich does not move Witlr'the valve and is not conected therewith.

Iclaimgy y f1.1'In la device ofthe character described, avalve stop lcoi'nprisinga pivoted 'member havinga laterally pi'ojet'zt-ing arm including av pair of friction applying members spaced substantially in the ldirection' 'of Athe axis upon Whichsaid kmeinberis vpivoted, 'and a rod fixed againstv movement 'about sai'd axis andprojecting between vsaid friction applying elements, said rod being fiictionally engaged by sai'dv elements, whereby to maintain position 2. A ventilator :adapted for ldistant contio'l comprising Ithe combination with a portedl casing, 'of' abalzincedy valve adapted in 4one position to closelsai'd port, means l`for pivotally `supperting said valvefor free oscillation vto"a'nd'ffrom its closed position, an adjustable stop in the path 'of'ioscillation f said valve, means interacting frict-ioiially with said stop and adaptedf'to maintain it in selected positions, and flexible `tensionmotion 7 transmitting connections for the' stop, 'said stop f being .confined against vmaterial lateral movement and bound impositively solely vby friction in selected positions of adjiistineiit\vhereby it is at' all times subjecttov manipulation through 'saidconnectio'ns 3.l Ina device7 'of' thecharacter described,

'the combination vWith y'an oscillatory plate valve, of aj stop therefor, incliiding a'niemsaid valve and provided vWith laterally' pro-v jecting frictionarms spaced!substantially in ythe 4kdirectionTof,I said' axis, a rod'ffulcruined 4. The combination Witha passaged ventilator Casin )rovided with a valve seat 'of a valvesupport including means forclosingkthe portion of said casingbeneatlr'said seat,A a plate valve'` fulcru'med'upon said support andI counter balancedI beneath 'its Ifulcruin, said"valve being osci'llatiiblezto and from said seat, a valve stop pivoted 'upon said support and adjustableabout its `pivot to limit the opening movement of `said valve, an arm projecting from said stop, andl means connected with said arm and extending to the fexterior oi". said casing, whereby said stop is manually operable. i

5. The combination with a passaged ventilator casing provided with a valve seat, of la valve support including means for closing the portion of said casing beneath said seat, `a platel valve ulcrumed upon said support and counter balanced beneath its fulcruin, said valve being oscillatable to and from said seat, a valve stop pivoted'upon said support and adjustable about its `pivot to limit the opening movement of said valve,

an arm projecting 'from said stop, a chain guided forV movement through said casing` and connected intermediate its ends with said arm, and means frictionally associated with said arm for maintaining it in a given adjustment. Y

6. A ventilator including acasinghaving f a passage therethrough and a valve seat therein, a balanced valve oscillatable to and from said seat, a valve stop oscillatable upon an axis nearly co-incident with the axis upon which said valve oscillates, an arm comprising a pair of spaced members projecting from the `face of said stop, a `post pivoted at one end and extending between said members in rictional relation therewith, and means exterior to said casing -for the manual Y operation of said stop, said arm andy post i being adapted to maintain said stop in adjustment.

7; A ventilator including a casing having a passage therethrough, a pair of upwardly converging plates disposed in the lower part of said passage, the upper margins of said plates being in closely spaced relation, a pin extending horizontally from plate to plate immediately adjacent their upper spaced margins and a valve ulcrumed upon said in. f p 8.r The combination with a `ventilator casing provided with a passage therethrough,

oi a valve support in said passage comprising a pair of converging plates having margins in closely spaced relation, valve supporting elements extending between said plates and connected with each, and a valve tulcrumed on said elements and provided- `and outlet, of a substantially rectangular valve plate having a weighted end and provided with a plurality of holes adjacent said weighted end, a plurality of pins secured Ato saidstructure below the lower margin of the inlet and received through the holes in said valve plate, whereby said plate may-haveV a` certain portion of its weight supported to be ventilatedpsaid compartment being.

provided with an opening ina wall thereof, of a casing providing a passage in communication with said opening and in communication at its other end with the outer air, a baille of substantially the size of said opening spaced from said wall, a valve seat within said casingya rectangular valve plate provided with a plurality of apertures, substantiallyhorizontalv pins passing through said apertures in supporting relation to said plate, whereby said plate-is pivoted for oscillation about a horizontal aXis to and Jfrom said seat, means for counterebalancing said valve plate, whereby it is rendered free to above said pins and a substantially equal i air currents, and a manually adjustable stop adapted to limit the opening movement of said valve plate, whereby `the amount of j f f GEORGE THOMAS MARKEY.'

move responsive and comparatively light a 

